Aouelloul Crater, large crater located 28 mi (45 km) southwest of Chinguetti, Mauritania, and thought to be of meteoritic origin. Discovered by air in 1951, it is 833 ft (250 m) in diameter and 33 ft in depth. A large amount of fused silica glass has been found in the area, but only one small meteorite fragment has been recovered from the crater.